摘要
针对天线阵单元间互耦会导致智能天线性能下降这一问题,提出了一种盲校正方法。该方法基于均匀圆阵(UCA)互耦矩阵的特殊结构形式,利用子空间原理和拉格朗日乘子法,不需要任何辅助信号源就能同时完成阵列误差的校正和波达方向(DOA)的估计。在进行计算机仿真时,还提出了以空间响应相关系数(SRCC)为准则来详细地分析互耦对阵列性能的影响,并通过一些典型的例子证明了所提出的盲校正方法的可行性。
In view of the fact that mutual coupling between elements in smart antennas always degrades the array processing performance, the paper proposes a novel blind calibration method for compensation of the error caused by the coupling. Based on the special structure of mutual coupling matrix of a uniform circular array, the proposed method uses the subspace principle and the method of lagrange multipliers to carry out both array calibration and direction-of-arrival estimation simultaneously without using any auxiliary signal sources. During the computer simulations, SRCC, i.e. spatial response correlation coefficient, was presented as a measure to quantify the effect of mutual coupling on the array in detail, and the validity of the proposed blind calibration method was verified through a few of typical experiments.
出处
《高技术通讯》
CAS
CSCD
北大核心
2008年第1期6-10,共5页
Chinese High Technology Letters
基金
国家自然科学基金(60496310
60672093)
863计划(2007AA01Z262)
973计划(2007CB310603)
江苏省自然科学基金(BK2005061)资助项目
关键词
智能天线
波达方向估计
阵元间互耦
阵列校正
smart antenna, direction-of-arrival estimation, mutual coupling between elements, array calibration
